This paper proposes a framework to measure the important metrics (throughput, delay, packet retransmits, signal strength, etc.) to determine Wi-Fi network performance of mobile robots supported by the Robot Operating ...
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ISBN:
(数字)9781665482431
ISBN:
(纸本)9781665482431
This paper proposes a framework to measure the important metrics (throughput, delay, packet retransmits, signal strength, etc.) to determine Wi-Fi network performance of mobile robots supported by the Robot Operating Systems (ROS) middleware. We analyze the bidirectional network performance of mobile robots through an experimental setup in an indoor environment, where a mobile robot is communicating vital sensor data such as video streaming from the camera(s) and LiDAR scan values to a command station while it navigates an indoor environment through teleoperated velocity commands received from the command station. The experiments evaluate the performance under 2.4 GHz and 5 GHz channels with different placement of Access Points (AP) with up to two network devices on each side. The framework is generalizable to vehicular network evaluation and the discussions and insights from this study apply to the field robotics community, where the wireless network plays a key role in enabling the success of robotic missions in real-world environments.
The impact of the surface roughness on the gate tunneling and capacitance of ultra-thin gate dielectrics was studied. It was found that the surface roughness has a profound influence on the oxide reliability predictio...
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The impact of the surface roughness on the gate tunneling and capacitance of ultra-thin gate dielectrics was studied. It was found that the surface roughness has a profound influence on the oxide reliability prediction and capacitance-voltage (C-V) characteristics. The distortion of the C-V curves was attributed to direct tunnelling and surface roughness in addition to series resistance effect.
作者：
Vandenbulcke, L.Herbin, R.CNRS
Cent de Recherches la Chimie de la Combustion et des Hautes Temperatures Orleans Fr CNRS Cent de Recherches la Chimie de la Combustion et des Hautes Temperatures Orleans Fr
The boron deposition is produced here by the reduction of boron trichloride downstream from a hydrogen discharge which avoids homogeneous nucleation of (BCl)//n solids. The discharge in the hydrogen stream is produced...
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The boron deposition is produced here by the reduction of boron trichloride downstream from a hydrogen discharge which avoids homogeneous nucleation of (BCl)//n solids. The discharge in the hydrogen stream is produced with a generator which can supply 200 watts of microwave energy at 2450 MHz in an air-cooled cavity. The substrate is independantly heated at temperature in the range 500-700 degree C. The deposition rates of amorphous boron lie in the range 50-800 A/min. They are studied as functions of the process parameters including substrate temperature, system pressure, reactant concentration, total gas flow and power dissipated in the discharge. In all these experiments, the distance between the BCl//3 inlet and the substrate was fixed. The influence of this distance (d) is also studied with different conditions of pressure and total gas flow.
A channel select filter is designed in particular for the 3.6 GHz range applications. The main function of the filter is to select a channel via a selecting voltage. It also provides a high gain for the selected bandw...
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ISBN:
(纸本)0780382536
A channel select filter is designed in particular for the 3.6 GHz range applications. The main function of the filter is to select a channel via a selecting voltage. It also provides a high gain for the selected bandwidth. The filter consists of an on-chip inductor in conjunction with an on-chip varactor. The varactor acts as a variable capacitor; the selecting voltage changes the junction capacitance of the varactor to shift the center frequency. The filter is implemented as an active BPF and provides about 5 dB gain for the selected bandwidth which operates on 1.8 Vdc. The gain and high passband selectivity are the results of the design of a high quality factor filter (few hundreds). A Q-enhancement circuit generates a negative impedance to compensate the low Q of the onchip inductor and provides further selectivity. The Q of this filter is also a function of an external control voltage (i.e., tunable Q). This option offers bandwidth settings for various applications in the selected frequency range. The filter also provides a simple implementation of the receiver as it replaces the off-chip front-end filter and the LNA.
This article proposes application of multi winding Isolated converter using asymmetrical cascaded multilevel Inverter (MLI) for solar electric vehicle. A 9 level MLI is getting multiple DC inputs by the help of a mult...
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We successfully demonstrate 1.0-Tb/s/lambda 3840-km and 1.2-Tb/s/lambda 1280-km long-haul transmissions in 4.2-THz full C-band 175-GHz-spaced WDM configuration with improving signal noise tolerance using 168-GBaud hig...
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ISBN:
(纸本)9781557524669
We successfully demonstrate 1.0-Tb/s/lambda 3840-km and 1.2-Tb/s/lambda 1280-km long-haul transmissions in 4.2-THz full C-band 175-GHz-spaced WDM configuration with improving signal noise tolerance using 168-GBaud high-symbol-rate PCS-16QAM and PCS-36QAM signals generated by our AMUX-integrated frontend module. (C) 2022 The Author(s)
Due to the large number of Chinese characters,the research on Chinese character generation tends to be unsupervised training,which is used to solve the problem that paired data is difficult *** styles of Chinese chara...
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Due to the large number of Chinese characters,the research on Chinese character generation tends to be unsupervised training,which is used to solve the problem that paired data is difficult *** styles of Chinese characters are diverse,and different styles of Chinese characters have the same potential content ***-task learning is more conducive to network learning of character structure and improves the efficiency of Chinese character *** this work,we explored the use of StarGAN v2 to implement an unsupervised multi-style Chinese character generation ***,we first replace style diversity loss with style code consistency loss to solve the problem of generation instability and redundant structure caused by emphasizing intra-domain ***,we add skip connections with adaptive instance normalization(AdaIN) to the encoder-decoder structure of the generator,to improve the problem of stroke detail loss during downsampling through feature *** on unpaired datasets of three target styles demonstrate that our model generates characters in higher quality than several advanced methods for Chinese character generation and image translation.
This work investigates the impact of thin electrical steel laminations on the performance of interior permanent magnet (IPM) motors for electric vehicle traction. Three different electrical steel grades are used in an...
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